The PCA9538PW is an Integrated Circuit (IC) component designed by NXP Semiconductors. It is an 8-bit I2C-bus and SMBus I/O expander with an open-drain output structure. This IC provides a simple solution for extending the number of I/O ports available to a microcontroller.
Key features of the PCA9538PW include:
1. 8-bit I/O Expander: The IC features 8 individually programmable I/O pins that can be configured as either inputs or outputs.
2. I2C Compatible: It supports both I2C-bus and SMBus communication protocols, allowing for easy integration with various microcontrollers and other I2C compatible devices.
3. Multiple Slave Addresses: The PCA9538PW supports up to 8 unique slave addresses, enabling the use of multiple devices on the same I2C bus.
4. Interrupt Output: It includes an interrupt output pin that can be configured to alert the microcontroller when a change of state occurs on any of the input pins.
5. Programmable Input Polarity: The IC allows configuring each input pin individually with its programmable polarity, enabling flexibility in signal level sensing.
6. Low Standby Current: With a low standby current of just 1 μA (typical), the PCA9538PW is energy-efficient and suitable for battery-powered applications.
7. Wide Voltage Range: It can operate within a wide supply voltage range of 2.3 V to 5.5 V, making it compatible with a variety of low-power and high-power systems.
8. ESD Protection: The IC is designed with built-in electrostatic discharge (ESD) protection, safeguarding the component from electrostatic damage.
Overall, the PCA9538PW is a versatile I/O expander IC that provides additional port expansion capabilities with convenient I2C communication. Its extensive features and compatibility make it suitable for various applications, including consumer electronics, industrial automation, and automotive systems.
